{"id":814928,"url":"http://patchwork.ozlabs.org/api/patches/814928/?format=json","web_url":"http://patchwork.ozlabs.org/project/uboot/patch/1505742050-5697-13-git-send-email-bmeng.cn@gmail.com/","project":{"id":18,"url":"http://patchwork.ozlabs.org/api/projects/18/?format=json","name":"U-Boot","link_name":"uboot","list_id":"u-boot.lists.denx.de","list_email":"u-boot@lists.denx.de","web_url":null,"scm_url":null,"webscm_url":null,"list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<1505742050-5697-13-git-send-email-bmeng.cn@gmail.com>","list_archive_url":null,"date":"2017-09-18T13:40:48","name":"[U-Boot,12/14] usb: xhci: Program max burst size for endpoint","commit_ref":"fa483b2c750f6ebdb5946f46b217aa3f9a449531","pull_url":null,"state":"accepted","archived":false,"hash":"857c0dc27c19e4e7142fbb5430afff16c5aa4fb9","submitter":{"id":64981,"url":"http://patchwork.ozlabs.org/api/people/64981/?format=json","name":"Bin Meng","email":"bmeng.cn@gmail.com"},"delegate":{"id":1699,"url":"http://patchwork.ozlabs.org/api/users/1699/?format=json","username":"marex","first_name":"Marek","last_name":"Vasut","email":"marek.vasut@gmail.com"},"mbox":"http://patchwork.ozlabs.org/project/uboot/patch/1505742050-5697-13-git-send-email-bmeng.cn@gmail.com/mbox/","series":[{"id":3647,"url":"http://patchwork.ozlabs.org/api/series/3647/?format=json","web_url":"http://patchwork.ozlabs.org/project/uboot/list/?series=3647","date":"2017-09-18T13:40:36","name":"usb: xhci: Add interrupt transfer support and full speed device support","version":1,"mbox":"http://patchwork.ozlabs.org/series/3647/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/814928/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/814928/checks/","tags":{},"related":[],"headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@bilbo.ozlabs.org","Authentication-Results":["ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=lists.denx.de\n\t(client-ip=81.169.180.215; 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charset=\"utf-8\"","Content-Transfer-Encoding":"base64","Errors-To":"u-boot-bounces@lists.denx.de","Sender":"\"U-Boot\" "},"content":"The 'Max Burst Size' indicates to the xHC the maximum number of\nconsecutive USB transactions that should be executed per scheduling\nopportunity. This is a “zero-based” value, where 0 to 15 represents\nburst sizes of 1 to 16, but at present this is always set to zero.\nLet's program the required value according to real needs.\n\nSigned-off-by: Bin Meng \n---\n\n drivers/usb/host/xhci.c | 21 ++++++++++++++++++++-\n 1 file changed, 20 insertions(+), 1 deletion(-)","diff":"diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c\nindex 8aed428..dfb188d 100644\n--- a/drivers/usb/host/xhci.c\n+++ b/drivers/usb/host/xhci.c\n@@ -395,6 +395,22 @@ static u32 xhci_get_endpoint_mult(struct usb_device *udev,\n \treturn ss_ep_comp_desc->bmAttributes;\n }\n \n+static u32 xhci_get_endpoint_max_burst(struct usb_device *udev,\n+\tstruct usb_endpoint_descriptor *endpt_desc,\n+\tstruct usb_ss_ep_comp_descriptor *ss_ep_comp_desc)\n+{\n+\t/* Super speed and Plus have max burst in ep companion desc */\n+\tif (udev->speed >= USB_SPEED_SUPER)\n+\t\treturn ss_ep_comp_desc->bMaxBurst;\n+\n+\tif (udev->speed == USB_SPEED_HIGH &&\n+\t (usb_endpoint_xfer_isoc(endpt_desc) ||\n+\t usb_endpoint_xfer_int(endpt_desc)))\n+\t\treturn usb_endpoint_maxp_mult(endpt_desc) - 1;\n+\n+\treturn 0;\n+}\n+\n /*\n * Return the maximum endpoint service interval time (ESIT) payload.\n * Basically, this is the maxpacket size, multiplied by the burst size\n@@ -493,6 +509,7 @@ static int xhci_set_configuration(struct usb_device *udev)\n \tu32 max_esit_payload;\n \tunsigned int interval;\n \tunsigned int mult;\n+\tunsigned int max_burst;\n \tunsigned int avg_trb_len;\n \n \tout_ctx = virt_dev->out_ctx;\n@@ -545,6 +562,8 @@ static int xhci_set_configuration(struct usb_device *udev)\n \t\tinterval = xhci_get_endpoint_interval(udev, endpt_desc);\n \t\tmult = xhci_get_endpoint_mult(udev, endpt_desc,\n \t\t\t\t\t ss_ep_comp_desc);\n+\t\tmax_burst = xhci_get_endpoint_max_burst(udev, endpt_desc,\n+\t\t\t\t\t\t\tss_ep_comp_desc);\n \t\tavg_trb_len = max_esit_payload;\n \n \t\tep_index = xhci_get_ep_index(endpt_desc);\n@@ -570,7 +589,7 @@ static int xhci_set_configuration(struct usb_device *udev)\n \t\t\t(get_unaligned(&endpt_desc->wMaxPacketSize)));\n \n \t\tep_ctx[ep_index]->ep_info2 |=\n-\t\t\tcpu_to_le32(((0 & MAX_BURST_MASK) << MAX_BURST_SHIFT) |\n+\t\t\tcpu_to_le32(MAX_BURST(max_burst) |\n \t\t\t((3 & ERROR_COUNT_MASK) << ERROR_COUNT_SHIFT));\n \n \t\ttrb_64 = (uintptr_t)\n","prefixes":["U-Boot","12/14"]}